Handle-bar pillar for bicycles.



Patented Aug. 28, I90fl J. s. DIKEMAN. HANDLE BAR PILLAR FUR BICYCLES.

(Application filed Mar. 7, 1900.)

(No Model.

Iii

[TNESSES W A tlamey nae mm PATENT rricn.

JOSEPH S. DIKEMAN, OF TORRINGTON, CONNECTICUT, ASSIGNOR OF ONE- I-IALF TO CHARLES S. DIKEMAN, OF SAME PLACE.

HANDLE-BAR PILLAR FOR BICYCLES.

SPEGIFIOATIQN forming part of Letters Patent No. 656,950, dated August 28, 1900.

Application filed a ch 7, 1900- To ctZZ whom it may concern:

Be it known that I, JosEPn S. DIKEMAN, of Torrington, in the county of Litchfield and State of Connecticut, have invented certain new and useful Improvements in Handle-Bar Pillars for Bicycles; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it apro pertains to make and use the same.

My invention relates to an improvement in handle-bar pillars for bicycles, the object of the invention being to provide means for adjustably securing the handle-bar pillar in the x5 fork-stem and independent means for adjustably securing the handle-bar to the pillar, so that when the handle-bar shall have been satisfactorily ad justed in the pillar the latter can be adjusted vertically in the fork-stem without disarranging the adjustment of the handle-bar.

lVith these ends in view my invention consists in the parts and combination of parts, as will be more fullydes'cribed, and pointed out in the claims.

In the accompanying drawings, Figure 1 is a View in longitudinal vertical section. Fig. 2 is a plan view, and Fig, 3 shows some of the parts detached.

A represents the handle-bar pillar, comprising the forging 1 and tubular stem 8, the latter being secured to the former by brazing or in any desired manner.

The forging 1 is provided with a horizontal bore or cavity 2 to receive the handle, with a vertical bore for the passage of the lockingbolt, and with a horizontal cavity or chamber 3 in rear of the horizontal bore 2 for the reception of the clamping-block 4. This clampingblock 4 fits easily within the cavity 3, and its front face is curved in the are of a circle to conform to the curvature of the bore 2 and is roughened or corrugated, so as to firmly grip the handle-bar and lock the same against movement. This block 4 is, as shown in Fig. 3, circular in cross-seeti0n and is held against outward displacement and forced into'contact with the handle by the screw-cap 5,which latter is screwed into the rear face of the forging l and bears against the rear face of the block. From this it will be seen that by Serial No. 7,659- (No model.)

loosening up the screw-cap 5 the block 4 is free to move rearwardly, thus releasing the handle-bar and permitting same to be turned or adjusted to suit the rider, and after the handle-bar has been once adjusted it is not disarranged or its position changed relative to the forging l by any subsequent adjustments of the handle-bar pillar in the fork-stem. The clam ping-block 4 passes transversely through the bore 3 and is providedwith an opening extending through the same from top to the bottom. This opening is of greater diameter than the screw-bolt 6. Hence it will be seen that when the parts are assembled, as shown in Fig. 2, the locking-block 4 is allowed ample movement back and forth to engage and release the handle-bar without engaging the screw-bolt 6. The screw-bolt 6 passes longitudinally through the pillar and pillar-stem and carries at its lower screw-threaded end the plug 7, which latter is made tapering externally and rests within the internally-tapered and slitted lower end of the pillar-stem.

The pillar-stem 8 is designed to snugly fit within the open upper end of the fork-stem. Hence it will be seen that by expanding the lower end of the pillar-stem the latter be comes locked or wedged to the fork-stem, and by forcing the tapered plug downwardly the slitted lower end of the pillar-stem contracts or assumes its normal position, thus releasing the handle-bar pillarstem and permitting same to be adjusted vertically without disturbing in the slightest the relative position of the handle-bar and forging carrying the same.

The head of the screw 6 rests on a washer 9, having a concave lower face to conform to the contour of the forging 1, and this head of the screw and the head of the screw-cap 5 are preferably of the same shape and size, so as to be turned by the same spanner.

This device is exceedinglysimple in its construction and operation, and its chief advantage resides in the fact that it permits of the vertical adjustment of the handle-bar pillar in the fork-stem without disturbing in the slightest the adjustment of the handle-bar.

It is evident that many slight changes might be resorted to in the relative arrangement of parts herein shown and described without departing from the spirit and scope of my invention. Hence I would have it understood that I do not wish to restrict myself to the exact construction herein shown and described; but,

Having fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. A handle-bar pillar having a cavity or seat for the handle-bar, a loose sliding block mounted in said pillar and having an opening through same, a screw-cap for forcing said sliding block against the handle, a screw-bolt of smaller diameter than the opening in the block and passing through said opening and means actuated by said screw-bolt for looking the pillar-stem to the fork-stem.

2. The combination with handle-bar pillar having a seat or cavity for the handle-bar,

and a slitted and internally-tapered lower end, of a sliding block located within a cavity in the handle-bar pillar in rear of the handle-bar, and provided with an opening passing vertically through same,'adjustable means for locking said block against the handle-bar, a screw-bolt of less diameter than the opening in the block and passing through said opening and means carried by said screw-bolt for expanding the slitted lower end of the pillar.

In testimony whereof I have signed this specification in the presence of two subscrib ing witnesses.

JOSEPH S. DIKEMAN. 

